Hi Naoya,

[auto build test ERROR on mmotm/master]
[also build test ERROR on v4.9-rc4 next-20161028]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Naoya-Horiguchi/mm-x86-move-_PAGE_SWP_SOFT_DIRTY-from-bit-7-to-bit-6/20161108-080615
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: arm-at91_dt_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All errors (new ones prefixed by >>):

   In file included from fs/proc/task_mmu.c:14:0:
   include/linux/swapops.h: In function 'swp_entry_to_pmd':
>> include/linux/swapops.h:216:14: error: empty scalar initializer
     pmd_t pmd = {};
                 ^
   include/linux/swapops.h:216:14: note: (near initialization for 'pmd')

vim +216 include/linux/swapops.h

   210	{
   211		return swp_entry(0, 0);
   212	}
   213	
   214	static inline pmd_t swp_entry_to_pmd(swp_entry_t entry)
   215	{
 > 216		pmd_t pmd = {};
   217	
   218		return pmd;
   219	}

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